A block copolymer having the general formula as formula(1): mediator-P2-P1-X, formula (1), and the chemical structural formula is formula (2), in which the mediator in formula(1) and formula (2) is a regulator, which is a conjugated seven-ring strcuture, P1 is a first polymer which may be a conjugated or non-conjugated olefin monomer, R1 is the functional group of P1, n is the number of the monomer of P1, which is a positive integer and the range is 10-1,500, P2 is a second polymer, m is the number of the monomer of P2, which is a positive integer and the range is 10-1,500, and X is the end of the block copolymer functional group. |